resin technologies. Houston is projected to experience a 2.7 percent increase in manufacturing employment by 2012. Metals manufacturing is a $12.0 billion industry in Houston, with nearly 2,100 establishments employing more than 67,000 workers in the region. Approximately 250 establishments employ more than 20,000 people in Houston's electronics manufacturing industries. Hewlett Packard employs more people in its Houston operations than any other HP facility in the world. Energy Houston is known as a world capital of the oil and gas industry with over 5000 energy firms doing business in the region. Historically, Houston has had several growth spurts (and some devastating economic recessions) related to the oil industry. The discovery of oil near Houston in 1901 led to its first growth spurt — by the 1920s, Houston had grown to almost 140,000 people. The city is a leading domestic and international center for virtually every segment of the oil and gas industry - exploration, production, transmission, marketing, service, supply, offshore drilling, and technology. Houston dominates U.S. oil and gas exploration and production. The city remains unrivaled as a center for the American energy industry. In January 2005, the Houston Primary Metropolitan Statistical Areas (PMSA) accounted for: 31% of all U.S. jobs in oil and gas extraction (38,300 of 123,400), and 14% of all U.S. jobs in support activities for mining (28,100 of 200,900). Houston is headquarters for 17 energy-related Fortune 500 companies and is home to more than 3,600 energy-related establishments. Houston is home to 13 of the nation's 20 largest natural gas transmission companies, 600 exploration and production firms and more than 170 pipeline operators. The Offshore Technology Conference held yearly in Houston presents the latest exploration and development technology in the energy industry to more than 50,000 attendees. Houston is a member of the World Energy Cities Partnership, a collaboration between 13 energy focused cities around the world. Mining which includes mostly oil and gas exploration and production in Houston accounts for 11 percent the region's GAP—down from 21 percent as recently as 1985. The reduced role of oil and gas in Houston's GAP reflects the rapid growth of other sectors—such as engineering services, health services, and manufacturing. Oil and gas exploration and production, however, has increased in reaction to high energy prices and a reduced worldwide surplus oil production capacity. Members of the oil and gas industry are representatives of most of the boards of Houston's arts